Katsuki is average height, with a slim, muscular build. He has short, spiky, sandy blond hair and choppy bangs that hang over his eyebrows. His eyes are sharp and bright red in color. His quirk is Explosion, he sweat basically nitroglycerin from his palms. He has to be angry to not pass out, so he's always yelling and angry. He's intelligent and is able to be quiet and calm in certain situations though. He shows his worry through anger, and genuinely cares even if he doesn't show it.